Access command delay using command delay circuitry
OwnerJason M. Brown, Vijayakrishna J. Vankayalainventors
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Abstract
Memory devices may have a memory array and a command delay circuit that adjusts signals associated with operations to access of the memory array. The memory device may also include a controller that delays an access command to access the memory array by transmitting the access command through delay circuitry of the command delay circuitry. This may cause the access command to be delayed by a first duration of time when output from the delay circuitry. Delay of the access command may align a data signal and the access command such that the access command and a system clock may cause latching of suitable data of the data signal.
Claims20
A device, comprising:
- a controller configured to access memory based on a command and a clock signal;
- and
- command delay circuitry configured to delay the command based on a phase difference between a data signal from a data (DQ) pin and the clock signal.
A device, comprising:
- a media controller configured to access memory media based on generating a command;
- and
- a subsystem operable to add latency to the command and communicatively coupled to the media controller, the subsystem comprising:
- a first input operable to receive a clock signal;
- a second input operable to receive the command;
- and
- command delay circuitry configured to delay the clock signal and the command based on a phase of a data signal from a data (DQ) pin.
A method of operating a subsystem of a memory media, comprising:
- receiving, via a first input, an access command;
- receiving, via a second input, a clock signal;
- aligning, via locking circuitry;
- the clock signal to a phase of a data signal from a data (DQ) pin;
- providing, from the locking circuitry based on aligning the clock signal to the data signal, at least one signal to first delay circuitry;
- and
- delaying the access command via the first delay circuitry being programmed based on the at least one signal.
Dependencies are inferred from the claim text.